Patrols and designated watch places
The National Police Agency’s history begins with Tokyo patrols based on tonsho in 1871. In 1874, designated kōbansho initially had no dedicated buildings: officers went out from a base to stand watch in rotation. This rotating watch also explains the name kōban.
Buildings and two operating patterns
Facilities were gradually added to designated locations, providing bases for neighborhood patrol. Kōbansho were renamed hashutsujo in 1881, and dispatch and residential posts spread nationwide in 1888. Rotation and residence established two important patterns in the later system.
A changing administrative framework
The National Archives’ institutional history records the former Police Act taking effect in 1948, followed by the 1954 revision that established the National Police Agency. Local posts need to be understood within these changes in police administration, rather than through a name assumed to imply an unchanged organization.
Kōban becomes the official name again
People continued to call the posts kōban while hashutsujo was their official designation. The formal name changed to kōban in July 1994. Tokyo Police also describe Roman-letter KOBAN signs to aid recognition. Names and building markers, including the familiar red light, are visible parts of an institution whose activity also takes place outside.